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精神堡壘
Author:
李春培
精神堡壘
GeoGebra
New Resources
球体的体积推导
四邊形的特性
三位數除以一位數（一）
球体的体积推导（优化版）
兩位數加法
Discover Resources
Drawing quadrilaterals on the grid or the pinboard
parallelogram and squares
不等式組-活動一
生活中的平面圖形關係─全等
合 24（附答案）
Discover Topics
Natural Numbers
Piecewise Functions
Sphere
Geometric Transformations
Difference and Slope